I can make sure that the goroutine is exited, because the goroutine count 
is stable but the heap count is always increase. You can see more detail 
pprof from https://comet.shiyanlou.com/debug/pprof/.


在 2016年9月6日星期二 UTC+8下午5:05:05,Dave Cheney写道:
>
> Are you sure that goroutines are exiting? You can check this in the 
> /debug/pprof handler. It will tell you how many goroutines are currently 
> running.
>
> On Tuesday, 6 September 2016 18:49:29 UTC+10, aide...@gmail.com wrote:
>>
>> I think 
>> https://gist.github.com/aiden0z/b8cf00953e81f778bd584fa2ff7eaae7#file-server-go-L268
>>   error 
>>  is not the core problem. The error is  ignored because the go-socket.io 
>> no error returned, see 
>> https://github.com/googollee/go-socket.io/blob/master/server.go#L91.
>>
>> go 1.6 and 1.7 I have tried, the problem still stands.
>>
>>
>> 在 2016年9月6日星期二 UTC+8下午4:25:40,Dave Cheney写道:
>>>
>>> This error handling looks wrong,
>>>
>>>
>>> https://gist.github.com/aiden0z/b8cf00953e81f778bd584fa2ff7eaae7#file-server-go-L268
>>>
>>> Any error from socketio is ignored, and the method always succeeds 
>>> unconditionally.
>>>
>>> Also, which version of Go are you using ?
>>>
>>> On Tuesday, 6 September 2016 18:07:42 UTC+10, aide...@gmail.com wrote:
>>>>
>>>> I have restart the the websocket service, and collect new callgraph.
>>>>
>>>> 1. in-use heap callgraph 
>>>>
>>>>
>>>> <https://lh3.googleusercontent.com/-mOinFHs1gmM/V854u84GSMI/AAAAAAAAAFI/Dz7zJN6hobsrhRDBTfE__iR-AXp-rpxkACLcB/s1600/comet_inuse_heap.png>
>>>>
>>>> 2. heap alloc callgraph
>>>>
>>>>
>>>> <https://lh3.googleusercontent.com/-zriittHlglE/V8542kygEqI/AAAAAAAAAFM/BojzIQ73zy0XbkrNeU4LX7dUAjC6T0ipQCLcB/s1600/comet_alloc_heap.png>
>>>>
>>>>
>>>>
>>>> 3. source code, pls see gist  
>>>> https://gist.github.com/aiden0z/b8cf00953e81f778bd584fa2ff7eaae7
>>>>
>>>>
>>>>
>>>> 在 2016年9月6日星期二 UTC+8下午3:42:06,Dave Cheney写道:
>>>>>
>>>>> Are you sure that goroutines are exiting? You can check this in the 
>>>>> /debug/pprof handler. It will tell you how many goroutines are currently 
>>>>> running. 
>>>>
>>>>

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